brunton



(No Model.) 3 Sheets-Sheet 1.

J. D. BRUNTON 85- F. H. J.-TRIER.

MAOHINERf'FOR DRESSING STONE.

Patented Jan.24, 1882 RS. Phol Liihngnpbor. Washlngtan, D. C.

3 SheetsSheet 2.

r14 PETERS, Phc!o-\.|\hognphur. Washington. n.6,

J. D. BRUNTON & P. H. J. TRIER. MACHINERY FOR DRESSING STONE.

(No Model.)

(No Model.) 3 Sheets-Sheet 3,

J. D. BRUNTON & F. H. J. TRIBE.

MADHINERY'FOR'DRESSING-STONE.

No. 252,725. Patented Jan. 24,1882

I turned by thehand-wheclLonly.

Unnrreo STATES PATENT OFFrcE.

JOHN D. BRUNTON AND FRANK H. J. TRIER, on WESTMINSTER, COUNTY or MIDDLESEX, ENGLAND.

MACHINERY FOR DRESSING STONE.

SPECIFICATION forming part of LettersPatent No. 252,725, dated January 24, 1882.

Application filed September 28, 1881. (No model.)

To all whom it may concern:

Be it known that we, JOHN DIoKINsoN .BRUNTON and FRANK HENRY J ULIUs TRIER,

(commonly known as FRANK TRIER,) subjects of the Queen of Great Britain, and residing at 19 Great- George Street, Westminster, in the county of Middlesex and Kingdom of England, have invented certain Improvements in Machinery or Apparatus for Dressing Stone, of which the following is a specification.

Our invention relates to an arrangement whereby an arrising-tool, such as is described in the specification to former Letters Patent granted to us for the United States of America, dated the 11th February, 1879, No. 212,182, may be applied to produce ar'rises upon stones dressed in a top-dressing machine of the construction described in the specification to our application for 1 Letters Patent of even date herewith, the arris-tool being attached to the cross-slide of such machine.

Figure l is a 'side elevation of part of a topdressing machine, showing one of the standards, the cross-slide, and arris-tool, with the mode of attachment to the cross-slide. Fig. 2

'is a sectional elevation taken at right angles to Fig. 1. Fig. 3 is a plan of the same; and Figs. 4, 5, 6, 7, and 8, details hereinafter referred to.

A is the standard of the machine. B is the cross-slide. O is a suspending-bracket bolted to the back of B. D D are tool-holders carried upon 0 by V-slides a a, permitting both D and D to move along 0 from side to side of the machine. E E are circular revolving cutters fixed on spindles b, and free to revolve with their spindles by contact of the cutters with the stone to be dressed. F F are cuttersockets carrying the cutter-spindles b b. FF are pivoted in D D upon trunnions G, Figs. 4 and 5, and, together with the bush j, to be hereinafter described, are held in place by the nuts and washers 0d. --H Hare screws by which the tool-holders are moved from side to side of the machine and are adjusted to the varying widths of stone to be operated upon. H is H is driven automatically in either direction by means of the fast and loose pulleys e and bevel-gear f and g. The object of this difference in the mode of moving the two cutter-holdersis this: In order to produce arrises lengthwise of the bed or table of the machine, one or both outters are fixed in the right position, as shown at E E, Fig. 2, and the stone fixed on'the table is caused to move to and fro beneath them; but in producing an arris on a stone at right angles to the length of the table or across the machine the stone is stationary, and the cutter attached to the tool-bolder D is automatically caused to move to and fro by the screw H, the cutter being in the position E, Fig. 1, D meanwhile being brought out of the way and as close to the hand-wheel as possible.

As described in the specification to our said former Letters Patent No. 212,182, the cuttersocket is left free to turn upon the trunnion G for the purpose of taking a position slightly askew to the line of movement of the stone or of the holder. The amount of skew is deter- 7o mined by the width of the notch, in Fig. 6, in the collar of the cutter-socket, and the rotation on the trunnion is checked by the tube i, which is screwed into the face of the bush 3'. (See Figs. 5, 6, 7.) Through the tube 2' is passed a pin, 70, having a collar, 1, on the end of which, after it is put in placein the tube, is screwed the eye at. Between 1 and the bottom of the tube iis a spiral spring, the function of which is to keep the end of the pin 70 up in the holes a n n, which are made in the face of D.

j is free to move round in D, and by withdrawing k until its end is free of D,j can be moved round .and again fixed by permitting is to enter into any one of the holes a n. Whenthe stone comes into contact with the cutter it causes the socket F to move round to the extent permitted, and thus to give to the cutter the required skew.

In Fig. 1,'E shows the position of a cutter when arrisiug lengthwise ofthe machine, and E the position when arrising across the machine. v

In Fig. 2, E E show the cutters fixed to arris the opposite edges of a stone lengthwise of the machine. Y An inclination of oneintwenty-four .is given to thecutters, as shown in Fig. 4, to give back clearance and to facilitatetheir cutting ac tion. This inclination should be given in the socket F in one direction, as in Fig. 4, and in F in the other direction, as indicated by the dotted line 019.

Fig. 8 is an enlarged plan of part of D, showing mode of fixing the nut in which the screw H works.

' \Ve claim as our invention- 1. The combination, with a top-dressing machine, of arris-tools mounted in pivotedadjustable sockets adapted to be set so as to produce arrises either lengthwise or crosswise of the bed or table, and arranged and operated substantially as hereinbefore set forth.

2. Thecoinbination, substantially as hereinbefore set forth, of the tool-holder, the arriscutter, the pivoted adjustable socket for the same, adapted to be set so as to cause thetool to cut lengthwise or crosswise of the stone, and mechanism for reciprocating the toolholder crosswise of the stone.

3. The combination of the tool-holdersD D,

the arris-tools mounted and arranged in the tool-holders in the manner substantially as herein described, the cross-shafts H H, the 25 means for actuating the same, and the bracket on which said tool-holders are supported and move, substantially as herein'before set forth.

In testimony whereof we have signed our names to this specification in the presence of 30 two subscribing witnesses.

JOHN DICKINSON BRUNTON. FRANK HENRY JULIUS TRIER. 

